Model Reduction Technique Tailored to the Dynamic Analysis of a Beam Structure under a Moving Load

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td align="left" rowspan="2">Rail length</td><td align="center" colspan="3">20 m</td><td align="center" colspan="3">90 m</td></tr><tr class="thead"><td align="center">Analytical</td><td align="center">Original</td><td align="center">Condensed</td><td align="center">Analytical</td><td align="center">Original</td><td align="center">Condensed</td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td align="left">Number of DOFs</td><td align="center">22</td><td align="center">260</td><td align="center">6</td><td align="center">92</td><td align="center">1158</td><td align="center">6</td></tr><tr><td align="left">Computation time</td><td align="center">3.66 s</td><td align="center">—</td><td align="center">1.18 s</td><td align="center">53.55 s</td><td align="center">—</td><td align="center">28.02 s</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Comparison of the computation times of the analytical model, the original wheel-rail contact FE model, and the condensed model (IRS).

Shock and Vibration

tab4

Table 4

Table 4: Model Reduction Technique Tailored to the Dynamic Analysis of a Beam Structure under a Moving Load 